Linux socket programming

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Viewed times. I am learning socket programming in linux and I have a problem. What causes this issue? Bora Bora 2 2 gold badges 4 4 silver badges 19 19 bronze badges. Do you read stackoverflow. Yes, I have checked it now.

Your Answer

That is my solution I think. The snippet is listed here: serverAddress.

Understanding Linux Sockets and the LDAPI Interface

Mathieu 5, 5 5 gold badges 25 25 silver badges 33 33 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook.

Using Internet Sockets

Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. I did not review the serverSock but most comments that apply to the clientSock also apply to the server socket. I started writing a series of blogs about Socket programming; Still not complete.

But as part of that series you will find a simple socket wrapper class. This is particularly bad here because it is in a header file.

Networking and Socket Programming Tutorial in C

You should not use it in a source file either bad habit. Putting it in a header file is worse because it can pollute other people's code any code that includes your header file. If I include your header file in my code it could potentially break my code in subtle ways. Things like that get you band from projects. An object should be created correctly or not created at all.

Never use the constructor to try and initialize an object that fails; then force the user to check to the state with an additional call. This will result in your users code having bugs as users of your code will forget to check the state. Error codes are great inside your object to indicate error states internally.

But error codes should never escape your public interface. Prefer to throw an exception rather than force the user of your object to check an error code to verify correctness. If something goes wrong that you can't fix locally then throw an exception. If the user of the code does not catch the exception then it will correctly terminate the application any other action is a bug without knowing the context.

You can then find this in testing and add the appropriate code to fix the problem or ignore it as appropriate. The compiler generates the copy constructor and copy assignment operator for you by default. So the following are not your only constructors. Conversely I would enable the move semantics of a socket object. So that it can be passed into functions etc. Read everything? You have not defined a protocol at this level. So how do you know what everything is?

They are used to set up the connection.

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But are not used after that point. So not really much point in keeping them as members. OK I am not going to say its totally wrong. But I think you should set up member variables in the constructor before calling member functions. Currently the state of the object is random for POD values and member functions assume especially public facing ones assume that the state of the object is well defined. Now using member function to set the state is OK if you have a couple of constructors and some large piece of common code. But I don't think this falls into the same category.

So I would initialize the members then call connect. Good practice to initialize all members so they have defined values. In the next one port will have an indeterminate value. This one shows that host and port are not really part of the state of the object. They should be removed from the object. As soon as you have a socket them they are no longer relevant.

This is a funny way of accessing member variables. The answer is the server and client both are software but not hardware. It means what is happening on the top is there are two different software executed. To be more precise, the server and client are two different processes with different jobs. If you are experienced with constructing a server, you might find out that a server can be built on a home computer by installing a server OS.

It is because server is a kind of software. Imagine a socket as a seaport that allows a ship to unload and gather shipping, whereas socket is the place where a computer gathers and puts data into the internet. Based on the example above, server is using port You can check it by the following command:.

Inside red bracket, you will find 0. The flow chart below shows the interaction between client and server. Because every process on the flow chart is needed and it acts as a very important role on network connection.

An Advanced Socket Communication Tutorial

As flow chart, bind function must be declared on both server and client. Server and client will start interacting with each other after the bind function and it is the most important session. From what flow chart shows, listen , accept , connect , three functions play very important roles.